Table 1

Participant demographics

GenderMale12
Female13
Age (years)20–294
30–395
40–493
50–645
65+8
EthnicityWhite12
Black7
Asian3
Mixed3
Socioeconomic grade (based on chief occupation of head of household)B (higher and intermediate managerial, administrative, professional occupations)4
C1 (supervisory, clerical and junior managerial, administrative, professional occupations)9
C2 (skilled manual occupations)6
D (semiskilled and unskilled manual occupations)2
E (unemployed and lowest grade occupations)4
Working statusIn full-time employment8
In part-time employment6
Currently not in paid employment4
Retired7
Highest level of educationNo qualifications3
GCSE Level or equivalent (usually age 16 years)4
A-Level or equivalent/vocational qualifications (usually age 18 years)5
College/university degree level or equivalent12
Postgraduate degree level1
  • GCSE, General Certificates of Secondary Education.